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Titre :	Bee size and pollen transfer in Cypripedium calceolus (Orchidaceae)
Type de document :	Tiré à part de revue
Auteurs :	Marianne Erneberg ; Brigitte Holm
Année de publication :	1999
Importance :	363-368
Langues :	Anglais (eng)
Catégories :	[CBNPMP-Thématique] Biologie de la reproduction [CBNPMP-Thématique] Coadaptation, coévolution, symbiose (dissémination, pollinisation)
Mots-clés :	Cypripedium calceolus L.
Résumé :	In Denmark Cypripedium calceolus is found in only two small and isolated populations, and its fruit set is suspected to be pollinator-limited. Collection and observations of flower visitors were carried out between 1995 and 1997, and fruit set were estimated. Forty-four visitors were collected. The majority belonged to the genera Halictus, Lasioglossum and Andrena. The latter is known as pollinator of C. calceolus in other parts of Europe, but in this study Andrena spp. were both not regular visitors and too large to function as efficient pollinators. Medium-sized halictine species, especially females of Halictus tumulorum and Lasioglossum calceatum, were the most regular and frequent pollen vectors. Andrena jacobi and Lasioglossum rufitarse are recorded for the first time in Denmark.
Lien pérenne :	DOI : 10.1111/j.1756-1051.1999.tb01128.x
Permalink :	https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130307

Bee size and pollen transfer in Cypripedium calceolus (Orchidaceae) [Tiré à part de revue] / Marianne Erneberg ; Brigitte Holm . - 1999 . - 363-368.
Langues : Anglais (eng)

Catégories :	[CBNPMP-Thématique] Biologie de la reproduction [CBNPMP-Thématique] Coadaptation, coévolution, symbiose (dissémination, pollinisation)
Mots-clés :	Cypripedium calceolus L.
Résumé :	In Denmark Cypripedium calceolus is found in only two small and isolated populations, and its fruit set is suspected to be pollinator-limited. Collection and observations of flower visitors were carried out between 1995 and 1997, and fruit set were estimated. Forty-four visitors were collected. The majority belonged to the genera Halictus, Lasioglossum and Andrena. The latter is known as pollinator of C. calceolus in other parts of Europe, but in this study Andrena spp. were both not regular visitors and too large to function as efficient pollinators. Medium-sized halictine species, especially females of Halictus tumulorum and Lasioglossum calceatum, were the most regular and frequent pollen vectors. Andrena jacobi and Lasioglossum rufitarse are recorded for the first time in Denmark.
Lien pérenne :	DOI : 10.1111/j.1756-1051.1999.tb01128.x
Permalink :	https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130307

Titre :	Reproductive biology of Anthyllis vulneraria subsp. vulgaris (Fabaceae) in northwestern Iberian Peninsula
Type de document :	Tiré à part de revue
Auteurs :	Luis Navarro
Année de publication :	1999
Importance :	281-288
Langues :	Anglais (eng)
Catégories :	[CBNPMP-Thématique] Stratégie de production de semences (fécondité) [CBNPMP-Thématique] Système de reproduction
Mots-clés :	Anthyllis vulneraria L. ssp. vulgaris (Koch) Corb.
Résumé :	In spite of being widely distributed throughout Europe, populations of Anthyllis vulneraria are very isolated genetically. As a consequence of processes of independent evolution, some isolated populations have developed characteristics that separate them from the rest. The scope of this study was to investigate whether or not this isolation has affected the reproductive biology. The reproductive biology of an isolated population of A. vulneraria subsp. vulgaris (Koch) Willk. in northwest Spain was studied, and compared with French populations. In the studied population, insect pollination was necessary for fruit production. Autogamy was precluded by protandry, although geitonogamous pollen transfer might occur. Supplementary pollination did not lead to any increase in fruit-set level, seed-pod weight or seed weight. Mean pollen/ovule ratio (3080) was within the normal range for xenogamous taxa. The first open flowers in capitula lived more than twice as long as later flowers did. During the floral life-span, corolla colour gradually changed from white to partially pink to pink and the nectar production rate appeared to differ between colour stages. Fruit set level in the studied population differed between the four years of study. The breeding system found in this Spanish population differs from French populations. I suggest that classification of this taxon in northwest Iberian Peninsula should be reconsidered, taking into account its breeding system.
Lien pérenne :	DOI : 10.1111/j.1756-1051.1999.tb01113.x
Permalink :	https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130315

Reproductive biology of Anthyllis vulneraria subsp. vulgaris (Fabaceae) in northwestern Iberian Peninsula [Tiré à part de revue] / Luis Navarro . - 1999 . - 281-288.
Langues : Anglais (eng)

Catégories :	[CBNPMP-Thématique] Stratégie de production de semences (fécondité) [CBNPMP-Thématique] Système de reproduction
Mots-clés :	Anthyllis vulneraria L. ssp. vulgaris (Koch) Corb.
Résumé :	In spite of being widely distributed throughout Europe, populations of Anthyllis vulneraria are very isolated genetically. As a consequence of processes of independent evolution, some isolated populations have developed characteristics that separate them from the rest. The scope of this study was to investigate whether or not this isolation has affected the reproductive biology. The reproductive biology of an isolated population of A. vulneraria subsp. vulgaris (Koch) Willk. in northwest Spain was studied, and compared with French populations. In the studied population, insect pollination was necessary for fruit production. Autogamy was precluded by protandry, although geitonogamous pollen transfer might occur. Supplementary pollination did not lead to any increase in fruit-set level, seed-pod weight or seed weight. Mean pollen/ovule ratio (3080) was within the normal range for xenogamous taxa. The first open flowers in capitula lived more than twice as long as later flowers did. During the floral life-span, corolla colour gradually changed from white to partially pink to pink and the nectar production rate appeared to differ between colour stages. Fruit set level in the studied population differed between the four years of study. The breeding system found in this Spanish population differs from French populations. I suggest that classification of this taxon in northwest Iberian Peninsula should be reconsidered, taking into account its breeding system.
Lien pérenne :	DOI : 10.1111/j.1756-1051.1999.tb01113.x
Permalink :	https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130315